/Engine/Source/Runtime/Engine/Classes/Engine/World.h
InitWorld usually has to be balanced with CleanupWorld. If the KeepInitializedDuringLoadTag LinkerInstancingContext tag is present, operations that need to call InitWorld during the Load of the World's package should break that rule and not call CleanupWorld.
static const [FName](API\Runtime\Core\UObject\FName) KeepInitializedDuringLoadTag;